package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/*
使用预编译SQL语句
 */
public class JDBCDemo7 {
    public static void main(String[] args) {
        UserInfo userInfo=InputUtil.getInputObject(new UserInfo(),"用户登录","登录");
        try ( Connection connection=DBUtil.getConnection()){
           String sql="SELECT username,password,nickname,age " +
                   "FROM userinfo " +
                   "WHERE username=? AND password=?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,userInfo.getUsername());
            ps.setString(2,userInfo.getPassword());
            ResultSet rs= ps.executeQuery();
            if (rs.next()){
                System.out.println("登录成功");
            }else{
                System.out.println("登录失败");
            }
            rs.close();
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }
}
